Impress comes with a collection of preformatted master pages. To customize presentations further, create your own slide masters.
Start Impress with an existing presentation or create a new one as described in Section 12.1.1, “Creating a Presentation”.
Click View › Master Slide.
This opens the current master slide in Master View. The Master View toolbar appears.
Right-click the left-hand panel, then click New Master.
Edit the master slide until it has the desired look.
Master view allows editing outline styles by directly formatting the sample text on the slide.
To finish editing master slides, in the Master View toolbar, click Close Master View. Alternatively, choose View › Normal.
Tip: Collect Master Slides in a Template
When you have created all of the master slides you want to use in your presentations, you can save them in an Impress template. Then, any time you want to create presentations that use those master slides, open a new presentation with your template.